Device for truing caps of fruit-jars.



PATENTED JULY 21, 1908.

L. H. FISCHER. DEVICE FOR TRUING GAPS 0F FRUIT JARS.

APPLIGATION FILED MAY 21, 1907.

/Jn 7/6 11 tar 'lllztn spses 2 i To all whom it may concern:

*LEWrs mFISCHER,'OFLNo-RMAN', oKL-AHoMA. I

-DEVIGE FOR 'rmirne' oars-F FRUIT-JARS.

-.l 3e it known that I, LEWIs H. FISCHER, a citizen of the United States, residing at Norman, inthe county of Cleveland, Oklahoma,- have invented a new and usefulDevice for Tru ng Caps of Fruit-Jars, of which'the following 1s a full, clear, and exact description,

reference being hadto the accompanying drawings.

Fruit ars are provided with screw-threaded sheet-metal caps, the-lower edge of the caps being flanged to correspond to the :sha e of the jar, and adapted to close against a s eet-rubber gasket to seal the jar airtight. y I I Inunscrewing, the caps from the jars, many persons force a knife or other instru' ment under-the edge of the flange to break the adhesion of the cap to the gasket or jar,

. vice.

. member or'tool 10, as shown in Fig. 6;

' tion 10', the terminals of which are provided- 'cheap and sim le "25 flan thus bending the flange out of. normal shape 'so thatit will not again form an air-tight closing of the jar. I

. The object of this invention is to provide a means for straightening and truing the ges of the ca s.

Referring to thedrawings: Figure 1 is a plan view of a portion of the improved deportion. Figs. 3 and 4 are, plan and edge views,respecti-vely, of a part of the device. Fig. 5 is an elevation view of a cap, showing the cap flange bent or distorted out of normal shape. Fig. 6 shows the invention in use.

Referring to the several figures, in all of which like characters of reference designate like parts, the improved device comprises a cast-metal mam portion 7 having mtegral feet 7* so that itmay be secured by screws to a board 8, table, or other suitable support.

The upper or head portion 7 c of this member 7 is shaped and screw threaded like the uper end of a fruit-jar, so'that the cap 9 may e screwed onto it.

In truing up. the caps 9 they are first screwed tightly onto the head 7 c of the mem her 7, and then operated upon by a clam ihng 1s clam 10, which is shown separately in Figs. 3 an 4, comprises an elastic C-shaped porwith integral handles 10 so that it may be Specification of Letters-Patent. Application filed. May 21, 1907. SeriaI No. 374,892.

Fig. 2 is an elevation view of the same- Patented July 21, 1908.

closed grippingly around the cap 9. The C- shaped portion 10 of the clamp member 10 is provided interiorly with screw threads of a gage to snugly fit exteriorly over the threads formed in the sheet-metal cap 9 when closed around said cap by gripping the handles 10 together. The lower edge of the O-shaped portion 10 of the clamp 10 is flanged, as at 10, so that when clamped and screwed down over the cap 9 it presses the flange 91 thereof down firmly and truly. against the surface 7 d of the member 7, thusstraightening and re-forming said flange. In screwing the cap 9 onto the form or head 7all dents and abnormal formations in the threads thereof will be pressed-out, andthe forcible action of the clamp 10 on the outside of said cap 9 will press the threads back into normal form.

As a means of exerting greater force upon the cap 9 by the clamp 10 than can be exe ed by gri' ping the handles 10, a screwt readed re 11 is secured'pivotally by a pin 12 to one of said handles and extends through an opening in the'other handle, the free end of said rod 11 being provided with a screwthreaded thumb-nut 13. This arrangement of parts places the but 13 in position where it may be screwed up by the thumb andfirrger,

of the hand simultaneously with the gripping-- of the handles 10 together, so that in cases requiring extra force to press the cap into proper shape said nut 13 and the rod 11 may e employed. The foregoing being a full, clear, and exact description of the invention, what I claim and desire to secure by Letters Patent is 1. In a device of the class described, a C- shaped clamping member having its clamping surface screwthreaded for engagement with the exterior surface of a screwthreaded cap, the terminals of said clamp being provided with hand holds for effecting its clamping engagements.

2. In a device of the class described, a die member adapted to have a cap placed over it, a C-shaped member adapted to engage the exterior of said cap, the terminals of said C- shaped member having hand-holds for clos ing'it, means operable by the thumb or finger of the hand for increasing the closing force of said C-shaped member.

,a jar-cap screwed onto it, an interi0r1yscrew- 1 through the opposite lever, said extension having a s'crewthreaded thumbq'mh 10 Witness my hand this sixth day of May,

3. Ina device of the ciassdescribed; a screwthreaded die member adapted to have threaded C-shaped clamping" member adapt- 1907.

ed to engage the exterior of said cap, said O- LEWIS H. FISCHER. shaped member being provided with levers Witnesses:

or hand-holds for closing it, one of said levers I W. T. EMERICK, having ascrewthreaded extension passing 1 FRANK P. SHEPARD. 

